I went with gloss, in keeping with all other gloss on my car (grills, spoiler, lip, roof soon and diffuser) but another reason was - I also couldnt make up my mind initially (before going all gloss on everything) and realised that after a few days of driving, the brake dust deposit would make my gloss rims look less shiny and almost matted, and then I would get to experience the best of both worlds! And it does happen like that haha!.